IBX-6878: Customize BO search suggestions (#2222)

---------

Co-authored-by: adriendupuis <adriendupuis@users.noreply.github.com>
Co-authored-by: Tomasz Dąbrowski <64841871+dabrt@users.noreply.github.com>
Co-authored-by: Marek Nocoń <mnocon@users.noreply.github.com>
(cherry picked from commit 454b71e)

code_samples/back_office/search/append_to_webpack.config.js

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+
+const ibexaConfigManager = require('./ibexa.webpack.config.manager.js');
+
+ibexaConfigManager.add({
+    ibexaConfig,
+    entryName: 'ibexa-admin-ui-layout-js',
+    newItems: [ path.resolve(__dirname, './assets/js/admin.search.autocomplete.product.js'), ],
+});

code_samples/back_office/search/assets/js/admin.search.autocomplete.product.js

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+(function (global, doc, ibexa, Routing) {
+    const renderItem = (result, searchText) => {
+        const globalSearch = doc.querySelector('.ibexa-global-search');
+        const {highlightText} = ibexa.helpers.highlight;
+        const autocompleteHighlightTemplate = globalSearch.querySelector('.ibexa-global-search__autocomplete-list').dataset.templateHighlight;
+        const {getContentTypeIconUrl, getContentTypeName} = ibexa.helpers.contentType;
+
+        const autocompleteItemTemplate = globalSearch.querySelector('.ibexa-global-search__autocomplete-product-template').dataset.templateItem;
+
+        return autocompleteItemTemplate
+            .replace('{{ productHref }}', Routing.generate('ibexa.product_catalog.product.view', {productCode: result.productCode}))
+            .replace('{{ productName }}', highlightText(searchText, result.name, autocompleteHighlightTemplate))
+            .replace('{{ productCode }}', result.productCode)
+            .replace('{{ productTypeIconHref }}', getContentTypeIconUrl(result.productTypeIdentifier))
+            .replace('{{ productTypeName }}', result.productTypeName);
+    };
+
+    ibexa.addConfig('autocomplete.renderers.product', renderItem, true);
+})(window, document, window.ibexa, window.Routing);

code_samples/back_office/search/config/append_to_services.yaml

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+services:
+
+    App\EventSubscriber\MySuggestionEventSubscriber: ~
+
+    App\Search\Serializer\Normalizer\Suggestion\ProductSuggestionNormalizer:
+        autoconfigure: false
+
+    app.search.suggestion.serializer:
+        decorates: ibexa.search.suggestion.serializer
+        class: Symfony\Component\Serializer\Serializer
+        autoconfigure: false
+        arguments:
+            $normalizers:
+                - '@App\Search\Serializer\Normalizer\Suggestion\ProductSuggestionNormalizer'
+                - '@Ibexa\Search\Serializer\Normalizer\Suggestion\ContentSuggestionNormalizer'
+                - '@Ibexa\Search\Serializer\Normalizer\Suggestion\LocationNormalizer'
+                - '@Ibexa\Search\Serializer\Normalizer\Suggestion\ParentLocationCollectionNormalizer'
+                - '@Ibexa\Search\Serializer\Normalizer\Suggestion\SuggestionCollectionNormalizer'
+            $encoders:
+                - '@serializer.encoder.json'
+
+    ibexa.search.autocomplete.product_template:
+        parent: Ibexa\AdminUi\Component\TabsComponent
+        arguments:
+            $template: '@@ibexadesign/ui/global_search_autocomplete_product_template.html.twig'
+            $groupIdentifier: 'global-search-autocomplete-product'
+        tags:
+            - { name: ibexa.admin_ui.component, group: global-search-autocomplete-templates }

code_samples/back_office/search/src/EventSubscriber/MySuggestionEventSubscriber.php

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+<?php declare(strict_types=1);
+
+namespace App\EventSubscriber;
+
+use App\Search\Model\Suggestion\ProductSuggestion;
+use Ibexa\Contracts\ProductCatalog\ProductServiceInterface;
+use Ibexa\Contracts\ProductCatalog\Values\Product\ProductQuery;
+use Ibexa\Contracts\ProductCatalog\Values\Product\Query\Criterion;
+use Ibexa\Contracts\Search\Event\BuildSuggestionCollectionEvent;
+use Ibexa\Contracts\Search\Mapper\SearchHitToContentSuggestionMapperInterface;
+use Psr\Log\LoggerAwareInterface;
+use Psr\Log\LoggerAwareTrait;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+class MySuggestionEventSubscriber implements EventSubscriberInterface, LoggerAwareInterface
+{
+    use LoggerAwareTrait;
+
+    private ProductServiceInterface $productService;
+
+    private SearchHitToContentSuggestionMapperInterface $contentSuggestionMapper;
+
+    public function __construct(
+        ProductServiceInterface $productService,
+        SearchHitToContentSuggestionMapperInterface $contentSuggestionMapper
+    ) {
+        $this->productService = $productService;
+        $this->contentSuggestionMapper = $contentSuggestionMapper;
+    }
+
+    public static function getSubscribedEvents(): array
+    {
+        return [
+            BuildSuggestionCollectionEvent::class => ['onBuildSuggestionCollectionEvent', -1],
+        ];
+    }
+
+    public function onBuildSuggestionCollectionEvent(BuildSuggestionCollectionEvent $event): BuildSuggestionCollectionEvent
+    {
+        $suggestionQuery = $event->getQuery();
+        $suggestionCollection = $event->getSuggestionCollection();
+
+        $text = $suggestionQuery->getQuery();
+        $words = explode(' ', preg_replace('/\s+/', ' ', $text));
+        $limit = $suggestionQuery->getLimit();
+
+        try {
+            $productQuery = new ProductQuery(null, new Criterion\LogicalOr([
+                new Criterion\ProductName(implode(' ', array_map(static function (string $word) {
+                    return "$word*";
+                }, $words))),
+                new Criterion\ProductCode($words),
+                new Criterion\ProductType($words),
+            ]), [], 0, $limit);
+            $searchResult = $this->productService->findProducts($productQuery);
+
+            if ($searchResult->getTotalCount()) {
+                $maxScore = 0.0;
+                $suggestionsByContentIds = [];
+                /** @var \Ibexa\Contracts\Search\Model\Suggestion\ContentSuggestion $suggestion */
+                foreach ($suggestionCollection as $suggestion) {
+                    $maxScore = max($suggestion->getScore(), $maxScore);
+                    $suggestionsByContentIds[$suggestion->getContent()->id] = $suggestion;
+                }
+
+                /** @var \Ibexa\ProductCatalog\Local\Repository\Values\Product $product */
+                foreach ($searchResult as $product) {
+                    $contentId = $product->getContent()->id;
+                    if (array_key_exists($contentId, $suggestionsByContentIds)) {
+                        $suggestionCollection->remove($suggestionsByContentIds[$contentId]);
+                    }
+
+                    $productSuggestion = new ProductSuggestion($maxScore + 1, $product);
+                    $suggestionCollection->append($productSuggestion);
+                }
+            }
+        } catch (\Throwable $throwable) {
+            $this->logger->error($throwable);
+        }
+
+        return $event;
+    }
+}

code_samples/back_office/search/src/Search/Model/Suggestion/ProductSuggestion.php

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+<?php declare(strict_types=1);
+
+namespace App\Search\Model\Suggestion;
+
+use Ibexa\Contracts\Search\Model\Suggestion\Suggestion;
+use Ibexa\ProductCatalog\Local\Repository\Values\Product;
+
+class ProductSuggestion extends Suggestion
+{
+    private Product $product;
+
+    public function __construct(
+        float $score,
+        Product $product
+    ) {
+        parent::__construct($score, $product->getName());
+        $this->product = $product;
+    }
+
+    public function getProduct()
+    {
+        return $this->product;
+    }
+}

code_samples/back_office/search/src/Search/Serializer/Normalizer/Suggestion/ProductSuggestionNormalizer.php

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+<?php declare(strict_types=1);
+
+namespace App\Search\Serializer\Normalizer\Suggestion;
+
+use App\Search\Model\Suggestion\ProductSuggestion;
+use Symfony\Component\Serializer\Normalizer\CacheableSupportsMethodInterface;
+use Symfony\Component\Serializer\Normalizer\NormalizerAwareInterface;
+use Symfony\Component\Serializer\Normalizer\NormalizerAwareTrait;
+use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
+
+class ProductSuggestionNormalizer implements
+    NormalizerInterface,
+    NormalizerAwareInterface,
+    CacheableSupportsMethodInterface
+{
+    use NormalizerAwareTrait;
+
+    public function normalize($object, string $format = null, array $context = [])
+    {
+        /** @var \App\Search\Model\Suggestion\ProductSuggestion $object */
+        return [
+            'type' => 'product',
+            'name' => $object->getName(),
+            'productCode' => $object->getProduct()->getCode(),
+            'productTypeIdentifier' => $object->getProduct()->getProductType()->getIdentifier(),
+            'productTypeName' => $object->getProduct()->getProductType()->getName(),
+        ];
+    }
+
+    public function supportsNormalization($data, string $format = null)
+    {
+        return $data instanceof ProductSuggestion;
+    }
+
+    public function hasCacheableSupportsMethod(): bool
+    {
+        return true;
+    }
+}

code_samples/back_office/search/templates/themes/admin/ui/global_search_autocomplete_product_item.html.twig

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+<li class="ibexa-global-search__autocomplete-item">
+    <a class="ibexa-global-search__autocomplete-item-link ibexa-link" href="{{ product_href }}">
+        <div class="ibexa-global-search__autocomplete-item-name">
+            {{ product_name }}
+            <div class="ibexa-badge">
+                {{ product_code }}
+            </div>
+        </div>
+        <div class="ibexa-global-search__autocomplete-item-info">
+            <div class="ibexa-global-search__autocomplete-item-content-type-wrapper">
+                <svg class="ibexa-icon ibexa-icon--tiny-small">
+                    <use xlink:href="{{ product_type_icon_href }}"></use>
+                </svg>
+                <span  class="ibexa-global-search__autocomplete-item-content-type">
+                    {{ product_type_name }}
+                </span>
+            </div>
+        </div>
+    </a>
+</li>

code_samples/back_office/search/templates/themes/admin/ui/global_search_autocomplete_product_template.html.twig

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+<div
+    class="ibexa-global-search__autocomplete-product-template"
+    data-template-item="{{ include('@ibexadesign/ui/global_search_autocomplete_product_item.html.twig', {
+        product_href: "{{ productHref }}",
+        product_name: "{{ productName }}",
+        product_code: "{{ productCode }}",
+        product_type_icon_href: "{{ productTypeIconHref }}",
+        product_type_name: "{{ productTypeName }}"
+    })|e('html_attr') }}">
+</div>

docs/administration/back_office/customize_search_suggestion.md

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+---
+description: Customize search suggestion configuration and sources.
+---
+
+# Customize search suggestion
+
+In the Back Office, when you start typing in the search field on the top bar, suggestions about what you could be looking for show up directly under the field.
+For more information about using this feature to search for content, see [user documentation]([[= user_doc =]]/search/search_for_content).
+
+## Configuration
+
+By default, suggestions start showing up after the user types in at least 3 characters, and 5 suggestions are presented.
+This can be changed with the following [scoped](multisite_configuration.md#scope) configuration:
+
+```yaml
+ibexa:
+    system:
+        <scope>:
+            search:
+                min_query_length: 3
+                result_limit: 5
+```
+
+## Add custom suggestion source
+
+You can add a suggestion source by listening or subscribing to `Ibexa\Contracts\Search\Event\BuildSuggestionCollectionEvent`.
+During this event, you can add, remove, or replace suggestions by updating its `SuggestionCollection`.
+After this event, the suggestion collection is sorted by score and truncated to a number of items set in [`result_limit`](#configuration).
+
+!!! tip
+
+    You can list listeners and subscribers with the following command:
+    ``` shell
+    php bin/console debug:event BuildSuggestionCollectionEvent
+    ```
+
+The following example is boosting Product suggestions.
+It's a subscriber that passes after the default one (because priority is set to zero), adds matching products at a score above the earlier Content suggestions, and avoids duplicates.
+
+- If the suggestion source finds a number of matching products that is equal or greater than the `result_limit`, only those products end up in the suggestion.
+- If it finds less than `result_limit` products, those products are on top of the suggestion, followed by items from another suggestion source until the limit is met.
+- If it doesn't find any matching products, only items from the default suggestion source are shown.
+
+This example event subscriber is implemented in the `src/EventSubscriber/MySuggestionEventSubscriber.php` file.
+It uses [`ProductService::findProducts`](product_api.md#products), and returns the received event after having manipulated the `SuggestionCollection`:
+
+``` php
+[[= include_file('code_samples/back_office/search/src/EventSubscriber/MySuggestionEventSubscriber.php') =]]
+```
+
+To have the logger injected thanks to the `LoggerAwareTrait`, this subscriber must be registered as a service:
+
+``` yaml
+services:
+    #…
+[[= include_file('code_samples/back_office/search/config/append_to_services.yaml', 2, 3) =]]
+```
+
+To represent the product suggestion data, a `ProductSuggestion` class is created in `src/Search/Model/Suggestion/ProductSuggestion.php`:
+
+``` php
+[[= include_file('code_samples/back_office/search/src/Search/Model/Suggestion/ProductSuggestion.php') =]]
+```
+
+This representation needs a normalizer to be transformed into a JSON.
+`ProductSuggestionNormalizer::supportsNormalization` returns that this normalizer supports `ProductSuggestion`.
+`ProductSuggestionNormalizer::normalize` returns an array of scalar values which can be transformed into a JSON object.
+Alongside data about the product, this array must have a `type` key, whose value is used later for rendering as an identifier.
+In `src/Search/Serializer/Normalizer/Suggestion/ProductSuggestionNormalizer.php`:
+
+``` php
+[[= include_file('code_samples/back_office/search/src/Search/Serializer/Normalizer/Suggestion/ProductSuggestionNormalizer.php') =]]
+```
+
+This normalizer is added to suggestion normalizers by decorating `ibexa.search.suggestion.serializer` and redefining its list of normalizers:
+
+``` yaml
+services:
+    #…
+[[= include_file('code_samples/back_office/search/config/append_to_services.yaml', 4, 20) =]]
+```
+
+!!! tip
+
+    At this point, it's possible to test the suggestion JSON.
+    The route is `/suggestion` with a GET parameter `query` for the searched text.
+
+    For example, log in to the Back Office to have a session cookie, then access the route through the Back Office SiteAccess, such as `<yourdomain>/admin/suggestion?query=platform`.
+    If you have a product with "platform" in its name, it is returned as the first suggestion.
+
+A JavaScript renderer displays the normalized product suggestion.
+This renderer is wrapped in an immediately executed function.
+This wrapping function must define a rendering function and register it as a renderer.
+It's registered as `autocomplete.renderers.<type>` by using the type identifier defined in the normalizer.
+
+```javascript
+ (function (global, doc, ibexa, Routing) {
+     const renderItem = (result, searchText) => {
+         // Compute suggestion item's HTML
+         return html;
+     }
+    ibexa.addConfig('autocomplete.renderers.<type>', renderItem, true);
+ })(window, document, window.ibexa, window.Routing);
+```
+
+To fit into the Back Office design, you can take HTML structure and CSS class names from an existing suggestion template `vendor/ibexa/admin-ui/src/bundle/Resources/views/themes/admin/ui/global_search_autocomplete_content_item.html.twig`.
+
+To allow template override and ease HTML writing, the example is also loading a template to render the HTML.
+
+Here is a complete `assets/js/admin.search.autocomplete.product.js` from the product suggestion example:
+
+``` js hl_lines="8"
+[[= include_file('code_samples/back_office/search/assets/js/admin.search.autocomplete.product.js') =]]
+```
+
+To be loaded in the Back Office layout, this file must be added to Webpack entry `ibexa-admin-ui-layout-js`. 
+At the end of `webpack.config.js`, add it by using `ibexaConfigManager`:
+
+``` javascript
+//…
+[[= include_file('code_samples/back_office/search/append_to_webpack.config.js') =]]
+```
+
+The renderer, `renderItem` function from `admin.search.autocomplete.product.js`, loads an HTML template from a wrapping DOM node [dataset](https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/dataset).
+This wrapping node exists only once and the renderer loads the template several times.
+
+The example template for this wrapping node is stored in `templates/themes/admin/ui/global_search_autocomplete_product_template.html.twig` (notice the CSS class name used by the renderer to reach it):
+
+``` html+twig hl_lines="2 3 9"
+[[= include_file('code_samples/back_office/search/templates/themes/admin/ui/global_search_autocomplete_product_template.html.twig') =]]
+```
+
+- At HTML level, it wraps the product item template in its dataset attribute `data-template-item`.
+- At Twig level, it includes the item template, replaces Twig variables with the strings used by the JS renderer,
+  and passes it to the [`escape` filter](https://twig.symfony.com/doc/3.x/filters/escape.html) with the HTML attribute strategy.
+
+To be present, this wrapping node template must be added to the `global-search-autocomplete-templates` group of tabs components:
+
+``` yaml
+services:
+    #…
+[[= include_file('code_samples/back_office/search/config/append_to_services.yaml', 22, 28) =]]
+```
+
+The template for the product suggestion item follows, named `templates/themes/admin/ui/global_search_autocomplete_product_item.html.twig`:
+
+``` html+twig
+[[= include_file('code_samples/back_office/search/templates/themes/admin/ui/global_search_autocomplete_product_item.html.twig') =]]
+```
+
+## Replace default suggestion source
+
+To replace the default suggestion source, [decorate]([[= symfony_doc =]]/service_container/service_decoration.html) the built-in `BuildSuggestionCollectionEvent` subscriber with your own:
+
+```yaml
+services:
+    #…
+    App\EventSubscriber\MySuggestionEventSubscriber:
+        decorates: Ibexa\Search\EventDispatcher\EventListener\ContentSuggestionSubscriber
+```